Year	Percent
1995-01-01	8.61523418550000
1996-01-01	7.82529326450000
1997-01-01	8.80914594725000
1998-01-01	9.22969245550000
1999-01-01	9.41321224700000
2000-01-01	9.19558621625000
2001-01-01	9.91099914775000
2002-01-01	10.61265664700000
2003-01-01	11.33759996250000
2004-01-01	11.39714240500000
2005-01-01	9.53951316775000
2006-01-01	9.00651105250000
2007-01-01	7.94582327300000
2008-01-01	6.50929171600000
2009-01-01	7.55505253850000
2010-01-01	6.50542061000000
2011-01-01	5.63284943300000
2012-01-01	6.96666666666667
2013-01-01	6.27500000000000
2014-01-01	5.91666666666667
2015-01-01	5.40833333333333
2016-01-01	4.95000000000000
2017-01-01	4.33333333333333